Similarities

This is a short list of all known similarities/relationships between Plory, Yoop, Snargg, and other characters. Keep in mind that this list won't go in to very minor characters until there's a lesson featuring any relationship between them, further notice, or that Curriculum Associates (the owners of Plory and Yoop) confirms this.

Personality/Solution/Appearance (about Plory and Yoop)
Even though Plory and Yoop get into conflict many times, Plory and yoop have similarities. Plory and Yoop have nearly identical curiosity levels, though Plory is based on life logic, and Yoop is more curious than Plory.

Plory and Yoop when in conflict, sometimes agree on an idea, bringing the student (i-Ready user/Agent X), into the next stage of the lesson. Plory and Yoop both have one tooth that is sticking out, freckles, and black eyes.

Yoop's relationship to Plory
Yoop uses Plory an answer to all his problems, well, not all of his problems though. Yoop can sometimes be smarter than Plory in some tricky questions/situations, but also helps her.

Plory's relationship to Yoop
Plory finds Yoop as an helper, and finds him to be mostly annoying and hyperactive. Plory would be upset if Yoop makes the problem worse. Either way, Plory likes Yoop.

As Yoop don't know a thing, Plory tells it to Yoop or Plory helps the i-Ready user/Agent X to solve it.

Plory's relationship to Snargg
Plory finds Snargg as an pet and also sometimes helpful, but also aware of his behavior and of how he acts. Plory can be also upset or disgusted at Snargg like when Snargg eating inanimate objects that Plory and Yoop needed, just as he eated the radio then burped it out at end of the Cube-Athlete-Thon lesson, or when there was an bone stuck to his ear and when Yoop pull it out, Plory is disgusted. He also once scared Plory, but either way, Plory still likes him.

Yoop/Snargg's relationship to Snargg/Yoop
Most of the time, Yoop/Snargg finds Snargg/Yoop to be hilarious (probably due to Snargg's occasional disgusting behavior, and Yoop's funny situations). They made some interactions.

In one lesson of Working with Words, while playing pretend, Yoop wants to have a dance with Snargg (who is wearing a princess dress), and Snargg agrees so they both dance, not before Plory interrupts them, much to Yoop's chagrin. In response of this, Yoop tells Snargg to stay away from the dragon (Plory), which makes Plory jealous and upset, not until she tells everybody that it's time for Story Round.

At the end of one lesson, Yoop (wearing a conductor hat), along with Snargg, tells Plory if she wants to go to the train, and Plory disagrees. Yoop doesn't care if she doesn't want to go there (saying that she gonna miss a lot at the train), and goes (along with Snargg) there anyway.

Sometimes, Yoop tries Snargg (as his test dummy) to do ridiculous stuff, like he put a jetpack to Snargg and then the jetpack goes loose and flies Snargg everywhere in one lesson of Working with Words.

Yoop/Snargg doesn't always enjoy this though.

At the end of one Math lesson, Yoop said what happens to Snargg's brain, so he does (along with Plory), and when they get to see it, they are both extremely disgusted (especially for Plory), and Yoop said that he regrets doing this.

At one lesson of Working with Words, they both argue who gets the cake to eat it. Plory joins in, and sees the problem. Then, she makes the cake float to her (with her "tinkerbell") and eat it. After that, Yoop is extremely disappointed and depressed, before getting interrupted by Plory that it's time for Story Round.

Despite this, Yoop still finds Snargg funny and likes him.

Plory's relationship with the Goopers
TBA